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CRADD
CARD and death domain containing adaptor protein
The *CRADD* gene provides instructions for making a protein involved in the regulation of programmed cell death (apoptosis) and inflammation. The *CRADD* gene encodes a protein known as CARD and death domain-containing adaptor protein.
CRADD is located on the long (q) arm of chromosome 12, at band 12q22. Arm ratio per GRCh38 - banding schematic.
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Overview
The *CRADD* gene is responsible for producing the CARD and death domain-containing adaptor protein, often simply referred to as CRADD. This protein is a key component in the intricate signalling networks that control apoptosis, a fundamental process of programmed cell death essential for development and tissue homeostasis.
Beyond its role in cell death, CRADD is also implicated in inflammatory responses, suggesting its broader involvement in cellular defence mechanisms.
What the gene does
The CRADD protein functions primarily as an adaptor molecule, facilitating interactions between different proteins to activate specific signalling cascades. It does this by containing two crucial domains: a Caspase Recruitment Domain (CARD) and a Death Domain (DD).
Through these domains, CRADD can interact with other CARD-containing or DD-containing proteins, acting as a bridge to assemble multi-protein complexes. These complexes are vital for transmitting signals that lead to apoptosis, such as those initiated by tumour necrosis factor receptors. The coordinated activity of CRADD in these pathways ensures the proper control of cell survival and elimination.
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Chromosome location
The *CRADD* gene is located on chromosome 12, specifically at position 12q22. This chromosomal address indicates its precise place within the human genome, where it contains the genetic information necessary for CRADD protein synthesis.
Protein structure
The CRADD protein is composed of 199 amino acids and features two distinct structural domains that are crucial for its function. The N-terminal region contains the CARD domain, spanning amino acids 1-91. Further along the protein, the Death domain is located between amino acids 116 and 188. These domains mediate protein-protein interactions, enabling CRADD to participate in complex signalling pathways.
Key variants
Genetic variations within the *CRADD* gene can alter the structure or function of the CRADD protein. Such changes can potentially disrupt its crucial roles in programmed cell death and inflammation. The functional consequences of these variants can range from mild effects to significant alterations in cellular processes.
Sample of pathogenic variants
6 pathogenic / likely-pathogenic variants from ClinVar, ranked by review status (expert-panel-reviewed first). This is a sample; recurrent founder variants in a specific population may not appear here - see the full ClinVar listing via the link above.
| Variant (HGVS) | Protein change | Classification | Evidence | Associated condition |
|---|---|---|---|---|
c.393G>A | p.Trp131Ter | Pathogenic/Likely pathogenic | ★★☆☆ | Intellectual disability, autosomal recessive 34 |
c.509G>A | p.Arg170His | Pathogenic | ★★☆☆ | Intellectual disability |
c.52_59del | p.Ala18fs | Pathogenic | ★★☆☆ | not provided |
g.(?_94243726)_(94244047_?)del | - | Pathogenic | ★☆☆☆ | not provided |
c.2T>C | p.Met1Thr | Pathogenic | ★☆☆☆ | Intellectual disability |
c.2T>G | p.Met1Arg | Pathogenic | - | Moderate intellectual disability |
Evidence stars indicate ClinVar review status. Individual variant interpretation should always be performed by a qualified clinical laboratory - many variants remain classified as Variants of Uncertain Significance (VUS) pending more research.
Associated conditions
Variations in the *CRADD* gene have been associated with a range of rare conditions. These conditions often involve developmental abnormalities or neurological impacts, reflecting the gene's underlying importance in fundamental cellular processes. The specific clinical presentation can vary depending on the nature of the genetic alteration.
No disease links recorded for this gene in our reference set.
UK clinical status
The *CRADD* gene is currently listed on several UK NHS National Genomic Test Directory panels, indicating its recognised clinical relevance within the UK healthcare system. It is included on the Foetal anomalies (green, R21), Intellectual disability (green, R29), and Malformations of cortical development (green) panels. This demonstrates its role in conditions involving foetal development and intellectual capabilities.
Sources: NHS GMS PanelApp · Genomics England PanelApp · NHS National Genomic Test Directory
Frequently asked questions
What is the main function of the CRADD protein?
The CRADD protein primarily acts as an adaptor molecule in cells, bringing other proteins together to initiate signalling pathways. It plays a key role in programmed cell death (apoptosis) and inflammatory responses.
How can variations in the CRADD gene affect health?
Variations in the *CRADD* gene can alter the normal function of the CRADD protein, which may disrupt cellular processes such as programmed cell death. This can lead to various rare conditions, often involving developmental problems or neurological issues.
Is the CRADD gene relevant in UK clinical genetics?
Yes, the *CRADD* gene is included on several UK NHS National Genomic Test Directory panels, including those for Foetal anomalies, Intellectual disability, and Malformations of cortical development. This indicates its importance in diagnosing and understanding relevant conditions within the UK.